@article{MM_1994_6_6_a4,
     author = {A. V. Bitsadze},
     title = {On structural properties of solutions of hyperbolic systems of partial differential equations of the first order},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {22--31},
     publisher = {mathdoc},
     volume = {6},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1994_6_6_a4/}
}